. >> hands now john stossel. john: the idea of sharing, communal property. it does lead to what economists call the tragedy of the comic. the tragedy because nasty things happen when everyone on something. i first heard that phrase and a story about some shepherds who live around a grassy area they call the commons. of the shepherds shared this free green grass and they grab as much as possible. captain breeding sheep. many more to raise. soon all the grass was gone. e sheep died. the shepherd said nothing. so then they debt divided it into parcels. now each one owned one. each had an incentive to limit the number that grazed on his grass. prosperity happened. everyone liv happily ever after. okay. isot quite that simple,ut we should think about this today on thanksgiving. this week school children were taught, it's a day of sharing. pilgrims and indians shared the fruits of the harvest, but that misses the point. most of their teachers don't even know. thanks to sharing the programs almost starved. george mason university economist brush roberts as the real